install Mac OS 9 :) and @ Damien: Rolling up windows was was a Mac feature which has been removed from OS X. it now available for Windows, basically roll up minimizes a window to the title bar.
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Molly7244Dec 17 '09 at 1:56

There used to be a way to "roll-up" your windows on the Mac. It was called "WindowShade" and it was both officially and unofficially available on the Classic Mac. Apple brought it in as part of Mac OS 8, but it had been available as a third party extension before that.

Now, under Mac OS X, it's no longer officially available. Up to 10.5, a company called unsanity had a "haxie" that would enable this feature: https://www.unsanity.com/haxies/wsx However, that hack isn't available under 10.6.

The option that Apple provides is of course to minimize to the dock, which isn't really a direct replacement for WindowShade, although it has been improved in 10.6.